of the union with candy crowley starts right now. >>> romney's chance to shake things up may come down to four and a half hours. >>> today this week's denver debate. the first of three 09-minute faceoffs. obama versus romney. >> how is it that you're the expert on my position when my position has been very clear? i'll tell you -- >> i'm the expert. i'm the expert, and i'm -- >> when he suggests that senator obama's plan is dangerous -- >> that's not the case. what he said was a precipitous withdrawal would be dangerous. he did not say -- >> he said -- >> sizing up the showdown with a man who has debated both 2012 candidates republican senator john mccain, and then the risk of being the frontrunner with obama's senior advisor david axelrod. plus, polls, ads, and early voting. with republican strategist alex castellanos, and cinderella and congressional correspondent dana bash. i'm candy crowley. this is "state of the union." >>> it would not be debate season if the political world and the campaigns didn't play the expectations game. >> the president is obviously a very eloquent, gifted speaker.